Effects of rhodium and platinum on the reactivity of lanthanum phases

Irusta, Silvia; Cornaglia, Laura María; Lombardo, E.A.

doi:10.1016/j.matchemphys.2004.04.017

Cited by 39 publications

(30 citation statements)

References 25 publications

(40 reference statements)

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“…All are layertype structures built up of slabs of (La 2 O 2 2þ ) n layers separated by CO 3 2À ions [26]. Type I has square layers and is tetragonal, whereas type Ia is described as a monoclinic distortion of form I [35]. II-La 2 O 2 CO 3 is completely indexed in the hexagonal unit cell [36].…”

Section: Tem For Reduced Catalystsmentioning

confidence: 99%

High performance of Mg–La mixed oxides supported Ni catalysts for dry reforming of methane: The effect of crystal structure

Chen

Lin

et al. 2013

International Journal of Hydrogen Energy

111

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Section: Tem For Reduced Catalystsmentioning

confidence: 99%

High performance of Mg–La mixed oxides supported Ni catalysts for dry reforming of methane: The effect of crystal structure

Chen

Lin

et al. 2013

International Journal of Hydrogen Energy

111

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“…They have been widely used in phosphors for fluorescent lighting [1] and [2], semiconductors [3] and [4], or time-resolved fluorescence labels for biological detection [5]. Lanthanum, the lightest element among the lanthanides, has been extensively examined as oxide, hydroxide, phosphate, or oxychloride for optical [6] and [7], solid electrolyte [8], catalytic [9], [10] and [11], and sorbent properties [12]. Especially, lanthanum hydroxide La(OH) 3 has been used as an intermediate step in the synthesis of the oxides or sulfides through dehydration or sulfuration, because that approach is straightforward [13].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, research was focused on two main features of La(OH) 3 , namely its catalytic and sorbent properties. Concerning catalysis, La(OH) 3 as well as La 2 O 3 is used as support for metals such as rhodium and platinum that are active for different reactions [11]. The major objective in terms of catalysis is to improve the catalytic capability, which can be achieved by the enlargement of the catalyst surface area, or/and by doping with selected metals like Ba, Pb or Cu [13].…”

Section: Introductionmentioning

confidence: 99%

Morphology-controlled nonaqueous synthesis of anisotropic lanthanum hydroxide nanoparticles

Djerdj

Garnweitner

et al. 2007

Journal of Solid State Chemistry

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The preparation of lanthanum hydroxide and manganese oxide nanoparticles is presented, based on a nonaqueous sol-gel process involving the reaction of La(OiPr) 3 and KMnO 4 with organic solvents such as benzyl alcohol, 2-butanone and a 1:1 vol. mixture thereof. The lanthanum manganese oxide system is highly complex and surprising results with respect to product composition and morphology were obtained. In dependence of the reaction parameters, the La(OH) 3 nanoparticles undergo a shape transformation from short nanorods with an average aspect ratio of 2.1 to micron-sized nanofibers (average aspect ratio is more than 59.5). Although not directly involved, KMnO 4 plays a crucial role in determining the particle morphology of La(OH) 3 . The reason lies in the fact that KMnO 4 is able to oxidize the benzyl alcohol to benzoic acid, which presumably induces the anisotropic particle growth in [001] direction upon preferential coordination to the ±(100), ±(010) and ±(−110) crystal facets. By adjusting the molar La(OiPr) 3 -to-KMnO 4 ratio as well as by using the appropriate solvent mixture it is possible to tailor the morphology, phase purity and microstructure of the La(OH) 3 nanoparticles. Postsynthetic thermal treatment of the sample containing La(OH) 3 nanofibers and β-MnOOH nanoparticles at the temperature of 800°C for 8 h yielded polyhedral LaMnO 3 and worm-like La 2 O 3 nanoparticles as final products.

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“…At 500°C and above only bands related to substrate can clearly be observed. Furthermore, above 375°C no bands are observed between 1,550 and 1,300 cm -1 , indicating that no (oxy)carbonates [23,26,29] are formed. In literature no FTIR results could be found regarding (perovskite) LLT.…”

Section: Thin Filmsmentioning

confidence: 94%

Amorphous and perovskite Li3xLa(2/3)−xTiO3 (thin) films via chemical solution deposition: solid electrolytes for all-solid-state Li-ion batteries

Ham

Peys

Dobbelaere

et al. 2014

J Sol-Gel Sci Technol

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Thin films of amorphous and crystalline perovskite Li 3x La (2/3)-x TiO 3 (LLT) (x = 0.117) are prepared by means of aqueous chemical solution deposition onto rutile TiO 2 thin films as an anode, yielding an electrochemical half-cell. The Li-ion conductivity of the pinhole free, amorphous LLT thin film (90 nm thick) is 3.8 9 10 -8 S cm -1 on Pt and 1.3 9 10 -8 S cm -1 on rutile TiO 2 , while measuring perpendicular to the thin film direction with impedance spectroscopy. Grazing angle attenuated total reflectance-Fourier transform infrared spectroscopy shows that all organic precursor molecules have been decomposed at 500°C. In addition, in situ (heating) X-ray diffraction analysis shows that phase pure crystalline perovskite LLT (x = 0.117) is formed on top of the rutile TiO 2 anode at 700°C. Furthermore, thickness control is possible by varying the precursor solution concentration and the number of deposition cycles. The current study presents a promising synthesis route to develop all-solid-state battery devices based on multi-metal oxide materials using aqueous precursor chemistry.

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Effects of rhodium and platinum on the reactivity of lanthanum phases

Cited by 39 publications

References 25 publications

High performance of Mg–La mixed oxides supported Ni catalysts for dry reforming of methane: The effect of crystal structure

High performance of Mg–La mixed oxides supported Ni catalysts for dry reforming of methane: The effect of crystal structure

Morphology-controlled nonaqueous synthesis of anisotropic lanthanum hydroxide nanoparticles

Amorphous and perovskite Li3xLa(2/3)−xTiO3 (thin) films via chemical solution deposition: solid electrolytes for all-solid-state Li-ion batteries

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